I have an old TV which has a single scart socket. I connected my Humax set top box to this (the Humax 2000T also only has one scart socket). I have just bought an LG dvd player which was supplied with a HDMI cable. I have connected this to the Humax with the HDMI cable but when I turn on the DVD player, nothing displays on my TV. I have no technical knowledge whatsoever. I thought it might need a coxial connection and bought a coxial cable – but that has made no difference. I can see the dvd disc counter moving on the dvd player and hear the disc going round but nothing is happening on my tv screen. Can someone please assist? Thank you.